भुवनकोशस्वभाववर्णनम् — सप्तद्वीप-पर्वत-लोकविन्यासः तथा यक्ष-उमा-प्रकाशः
दृष्ट्वा यक्षं लक्षणैर्हीनमीशं दृष्ट्वा सेन्द्रास्ते किमेतत्त्विहेति यक्षं गत्वा निश्चयात्पावकाद्याः शक्तिक्षीणाश्चाभवन् यत्ततो ऽपि
dṛṣṭvā yakṣaṃ lakṣaṇairhīnamīśaṃ dṛṣṭvā sendrāste kimetattviheti yakṣaṃ gatvā niścayātpāvakādyāḥ śaktikṣīṇāścābhavan yattato 'pi
Seeing that Yakṣa—though appearing devoid of recognizable marks—was in truth the Lord, the Devas with Indra exclaimed, “What is this here?” Approaching that Yakṣa to ascertain the truth, Agni and the others found their powers depleted—indeed, even beyond what they expected.
Suta Goswami (narrating the Devas’ encounter within the Purana’s frame)
It teaches that Shiva (Pati) may appear without outward “marks,” yet remains the Supreme; Linga worship trains the devotee to recognize the formless Lord beyond appearances and ego-based certainty.
Shiva-tattva is shown as transcendent and self-concealing: even the Devas cannot gauge Him by ordinary signs, and their limited powers collapse before His higher reality.
The key practice is inner surrender (śaraṇāgati) and humility—central to Shaiva sādhanā and Pāśupata orientation—recognizing that siddhis or divine powers are secondary to realizing Pati.